(Sorry, dry humor tonight. ((get it...dry humor.....dry toast....baaahahahahhaha)). I amuse myself endlessly. My wife puts on headphones, you are stuck reading it.)
I am strictly a one way consumer of youtube. (did you know youtube and netflix are now 50% of internet traffic?) So I don't notice the changes except the buzz that the "comments are more relevant" now. But am not a consumer of comments, uploader of content or any of that. And I do have a G+ account so I am sold out.
However, I do NOT agree that you must convert your account to G+. That is exceedingly manipulative. They are winning the battle to own the interwebz because of moves like that.